API: Verify
_.isObject
Check whether the given data is of type Object. Returns false for other data types including Array.
Parameters
data::any
Returns
boolean
Examples
_.isObject([1, 2, 3]); // Returns false
_.isObject({ a: 1, b: 2 }); // Returns true_.isEqual
It compares the first argument value as the left operand and the argument values given thereafter as the right operand, and returns true if the values are all the same.
isEqual returns true even if the data types do not match, but isEqualStrict returns true only when the data types of all argument values match.
Parameters
leftOperand::anyrightOperand::any||any[]||...any
Returns
boolean
Examples
const val1 = 'Left';
const val2 = 1;
_.isEqual('Left', 'Left', val1); // Returns true
_.isEqual(1, [1, '1', 1, val2]); // Returns true
_.isEqual(val1, ['Right', 'Left', 1]); // Returns false
_.isEqual(1, 1, 1, 1); // Returns true_.isEqualStrict
It compares the first argument value as the left operand and the argument values given thereafter as the right operand, and returns true if the values are all the same.
isEqual returns true even if the data types do not match, but isEqualStrict returns true only when the data types of all argument values match.
Parameters
leftOperand::anyrightOperand::any||any[]||...any
Returns
boolean
Examples
const val1 = 'Left';
const val2 = 1;
_.isEqualStrict('Left', 'Left', val1); // Returns true
_.isEqualStrict(1, [1, '1', 1, val2]); // Returns false
_.isEqualStrict(1, 1, '1', 1); // Returns false_.isEmpty
Returns true if the passed data is empty or has a length of 0.
Parameters
data::any?
Returns
boolean
Examples
_.isEmpty([]); // Returns true
_.isEmpty(''); // Returns true
_.isEmpty('abc'); // Returns false_.isUrl
Returns true if the given data is in the correct URL format. If withProtocol is true, it is automatically appended to the URL when the protocol does not exist. If strict is true, URLs without commas (.) return false.
Parameters
url::stringwithProtocol::boolean || falsestrict::boolean || false
Returns
boolean
Examples
_.isUrl('google.com'); // Returns false
_.isUrl('google.com', true); // Returns true
_.isUrl('https://google.com'); // Returns true_.contains
Returns true if the first string argument contains the second argument "string" or "one or more of the strings listed in the array". If the exact value is true, it returns true only for an exact match.
Parameters
str::any[]|stringsearch::any[]|stringexact::boolean || false
Returns
boolean
Examples
_.contains('abc', 'a'); // Returns true
_.contains('abc', 'd'); // Returns false
_.contains('abc', ['a', 'd']); // Returns true_.is2dArray
Returns true if the given array is a two-dimensional array.
Parameters
array::any[]
Returns
boolean
Examples
_.is2dArray([1]); // Returns false
_.is2dArray([[1], [2]]); // Returns true_.between
Returns true if the first argument is in the range of the second argument ([min, max]). To allow the minimum and maximum values to be in the range, pass true for the third argument.
Parameters
range::[number, number]number::numberinclusive::boolean || false
Returns
boolean
Examples
_.between([10, 20], 10); // Returns false
_.between([10, 20], 10, true); // Returns true_.len
Returns the length of any type of data. If the argument value is null or undefined, 0 is returned.
Parameters
data::any
Returns
boolean
Examples
_.len('12345'); // Returns 5
_.len([1, 2, 3]); // Returns 3_.isEmail
Checks if the given argument value is a valid email.
Parameters
email::string
Returns
boolean
Examples
_.isEmail('[email protected]'); // Returns true_.isTrueMinimumNumberOfTimes
Returns true if the values given in the conditions array are true at least minimumCount times.
Parameters
conditions::boolean[]minimumCount::number
Returns
boolean
Examples
const left = 1;
const right = 1 + 2;
_.isTrueMinimumNumberOfTimes([true, true, false], 2); // Returns true
_.isTrueMinimumNumberOfTimes([true, true, false], 3); // Returns false
_.isTrueMinimumNumberOfTimes([true, true, left === right], 3); // Returns false